<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                </el-col>
                        </el-row>
                    </el-col>
                    </el-row>

            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data(){
        return {
            rolelist: [],
            setRightDialogVisible: false,
            rightslist: [],
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            defKeys: [],
            roleId: ''
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        async getRolesList(){
            const {data: res} = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败!')
            }
            this.rolelist = res.data
        },
        async removeRightById(role, rightId) {
            const confirmResult = await this.$confirm(
                '此操作将永久删除该文件, 是否继续?',
                '提示',
                {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }
            ).catch(err => err)

        if(confirmResult !== 'confirm') {
            return this.$message.info('取消了删除!')
        }
        const {data: res} = await this.$http.delete(
            `roles/${role.id}/rights/${rightId}`
        )
        if(res.meta.status !== 200) {
            return this.$message.error('删除权限失败!')
        }
        role.children = res.data
        },

        async showSetRightDialog(role) {
            this.roleId = role.id
            const {data: res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败!')
            }
            this.rightslist = res.data
            this.getLeafKeys(role, this.defKeys)
            this.setRightDialogVisible = true
        },

        getLeafKeys(node, arr){
            if(!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },

        setRightDialogClosed(){
            this.defKeys = []
        },

        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')

            const{data: res} = await this.$http.post(
                `roles/${this.roleId}/rights`,
                {rids: idStr}
            )
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败!')
            }
            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
</style>